TS-Optics 1.25" UV & IR Cut Filter - Low Profile Filter Cell

TS-Optics 1.25" Low-Profile Infrared Cut Filter

The filter blocks UV and infrared light. The surfaces are fine-optically polished and plane-parallel for maximum contrast. With its dielectrical coating, the filter is particularly hard-wearing and durable. The filter can be mounted even in very compact filter wheels or filter sliders, as the cell is very short with its 4 mm height.

Applications of the TS UV-IR cut filter:

Lunar and planetary photography:

Telescope optics, Barlow lenses and eyepieces are corrected for the visual spectral range, not for infrared light, but camera sensors are sensitive even in the infrared range. The result is a considerable reduction of sharpness. The TS-Optics IR1-E blocks the infrared light, the sharpness increases.

Deep-sky photography

A similar effect can be noticed here. Without the IR cut filter, the stars seem to be large and a bit "softer". By blocking the IR light, the star becomes better defined and sharper.

Dust protection

The filter shows no effect when observing visually, as the human eye is not sensitive to infrared. Thus we alreadily have a "built-in" IR cut filter. But the filter protects the delicate accessories from dew and dust.